The chairman of Japan’s Nuclear Regulation Authority instructed the agency to assess the risks and consider measures for potential dangers related to the damage on the floor of the No. 1 reactor at the Fukushima Daiichi nuclear power plant.
Tokyo Electric Power Company reported that there is a high possibility of a hole in the reactor floor due to the nuclear fuel fragments melting and causing damage to the floor.
The Sankei newspaper reported that more than half of the inner wall of the cylindrical concrete pedestal that supports the pressure vessel has been eroded, with the thickness of about 1.2 meters and a height of about 8.5 meters.
While the NRA chairman stated that there is no significant concern about safety, he urged a speedy confirmation of the safety of the plant. Tokyo Electric Power Company’s and the regulator’s attitudes were criticized for being too relaxed.